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Axion inflation with an SU(2) gauge field: detectable chiral gravity waves
Journal of High Energy Physics
We study a single field axion inflation model in the presence of an SU(2) gauge field with a small vev. In order to make the analysis as model-independent as possible, we consider an arbitrary potential for the axion that is able to support the slow-roll inflation. The gauge field is coupled to the axion with a Chern-Simons interaction λ/fF_μν^aF̃_a^μν where λ/f∼O(10). It has a negligible effect on the background evolution, ρ__ YM/M_ Pl^2H^2≲ϵ^2. However, its quantum fluctuations make adoi:10.1007/jhep07(2016)104 fatcat:vyamlejysbh55nyf2cw3ni4n5i